Carotenoids are red, orange, or yellow pigments found in many plants. usually we see these accessory pigments only in the fall. why aren't the red, orange, and yellow colors visible all year long? a) the carotenoids have much less energy than chlorophyll. b) the accessory pigments only absorb light; they do not reflect light. c) chlorophyll is more abundant in the leaves and masks the accessory pigments. d) plants only reflect wavelengths of visible light that represent the color green.

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

What is the inability of an individual or a society to achieve a minimum standard of living known as ?

Which of the following are the ingredients that go into the plant and are needed for photosynthesis? select all that apply. 1.) soil 2.) seeds 3.) carbon dioxide 4.) minerals 5.) glucose (sugar) 6.) water 7.) light energy (sunlight) 8.) oxygen 9.) air